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Old 25th November 2011, 11:30 AM   #3161
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Here is a 3 band equalizer that could be modified for your purpose :
HeadWize - Project: Designing A Pocket Equalizer For Headphone Listening (A HeadWize Design Series Paper)
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Old 25th November 2011, 12:57 PM   #3162
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Post 3152. Pin 2 is ground, Pin 1 and Pin 3 are supplied with 3kOhm current limit resistors.
Both channels go into the positive sides of the opamps. After studying this i think my circuit will work.
Flavio is recommending to supply the cartridge from batteries for safety. See my modified circuit if you want to do that. Maybe over the weekend i find the time to modify the Gilmore EQ.
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Old 25th November 2011, 03:00 PM   #3163
MiiB is offline MiiB  Denmark
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You're a MAD man.. I'll get to your Buffer ideas shortly, I have been rather busy, with updates to my speakers...

Think that yous second concept seems quite promising.. I'll run some sims on that...
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Old 25th November 2011, 04:04 PM   #3164
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If i would be mad my circuits would not work. I would more call it like a flow. I work like a dog though without any apparent reason.
Thanks for simulating. Yes, your speakers need your full attention. I really admire you, that you take the trouble to design the drive units yourself.
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Old 25th November 2011, 08:12 PM   #3165
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by Joachim Gerhard View Post
I work like a dog though without any apparent reason.
I perfectly understand you my Friend. I also do the same. It seems to bring me some peace of mind.
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Old 25th November 2011, 08:15 PM   #3166
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Yes, that is.
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Old 25th November 2011, 10:17 PM   #3167
hesener is offline hesener  Germany
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are you seriously venturing into tube land?

BTW some folks here are missing you at ETF.......
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Old 25th November 2011, 10:24 PM   #3168
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Well, Thomas Fast would like a tube output stage. I like tubes too, sure. Besides the high voltage they are easy to design with. But no, i will not devote too much time to design tube phono stages. Did you get your Starless ready and how is the mood there ? I really would love to be there but it simply did not fit into my schedule.
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Old 25th November 2011, 10:45 PM   #3169
tabams is offline tabams  Netherlands
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Joachim, with more than hundred amps built on this thread, I am asking myself. Do we get in short time a sort of TOMBOLA for DIY members, so you get rid of them ;-))
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Old 25th November 2011, 10:57 PM   #3170
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I plan to donate them to an art institute.
But good idea. I will look what circuits i can spare.
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